Create supportive activities and assignments
For each high-stakes writing assignment,
1. Break down the sequence of work: what steps will students need to take to complete the project?
2. Decide which steps in the process will prove most challenging.
3. Create support activities for those challenging parts.
Support should always include drafts and revisions based on feedback from you and, if possible, from peers.
Other forms of support: breaking the project into stages or parts, in-class exercises and low/medium-stakes assignments in order to practice critical skills and/or accomplish parts of the assignment, formative use of evaluation criteria (students apply the criteria to a sample essay or you annotate a sample essay using the criteria).